81546

Appears in sequences

• Number of forests of rooted trees with total weight n, where a node at height k has weight 2^k (with root considered to be at height 0).at n=47A115593
• Smith numbers of order 3.at n=32A178213
• Number of (n+1)X(n+1) 0..3 symmetric matrices containing all values 0..3 with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in lower triangle row major order.at n=3A210817
• Numbers k such that k - 13, k + 1, k + 5, k + 7, and k + 13 are all prime.at n=14A281937